Well-drilling machine.



No. 834.642. 3 IPATENTED 00:13.30, 1906.

L. K. ROBBINS.

WELL DRILLING MACHINE.

APPLIOATION FILED JAN. 25, 1906.

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' To all whom it may concern.-

LEROY ROBBINS, or ST. LOUIS, MISSOURI.

WELL-DRILLING MACHINE.

Specification of Letters Patent.

Patented Oct. 30, 1906.

Application filed January 25. 1906 Serial No. 297,798

. Be it known that I, LEROY K. ROBBINS, a citizen of the United States, residing in the city of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Well- Drilling Machines, of which the following is a full, clear, and exact description, reference beinghad to the accompanying drawings, forming part of this specification.

' My invention relates to a machine'for drill.

ing wells or other holes in the earth; and the v invention has for its object to provide a tilting samson-post which is rockingly supported on the carriage of the machine and in turn rockingly supports the walking-beam, whereby the walking-beam may be shifted to pro vide clearance for the tool-rope in withdrawing the tool from the well.

The invention further has for its object to i so mount the temper-screw at the forward end of the walking-beam as to secure as nearly as possible a direct vertical movement of the temper-screw in order that the tool-rope may be raised and lowered in the hole beingdrilled in as nearly a vertical line as may be possible where a plain walkingbeam is used.

Figure I is a view, partly in elevation and partly in vertical longitudinal section, of my machine. Fig. II isan enlarged elevation of the lower end of the tilting samson-post and its bearing. Fig. III is an enlarged view, partly in vertical section and partly in elevation, of the jack-rod and shift-rod that control the Samson-post and the slide and box with which these parts are associated. Fig. IV is an enlarged view, partly in elevation and partly in vertical section, of the walkingbeam and the upper end of the temper-screw connected thereto. the parts shown in Fi IV.

1 designates one o the ground-wheels of the carriage of my machine, in which is mounted the axle 2. (See Fig. I.)

3 is a bolster surmounting the axle 2 and which supports the carriage-sills 4, that at their opposite ends are supported by suitable ground-wheels and axle.

5 designates a socket-box mounted upon the bolster 3 centrally of its ends. This box is provided with upwardly-extending, ears, in which is mounted a pivot-rod 6, that is preferably held from rotation by one or more set-screws 7. (See Figs. I and II.)

8 designates a tilting samson-post which is Fig. V is an end view of' sitioned within the socket-box 5 and is provided with ears 10, through which the pivotrod 6 passes, the ears 10 being preferably of such dimensions that they will-rest upon the top surface of the socket-box for rocking motion thereon, thereby relieving the pivotrod 6 from strain and from shearing action of the rocking-block ears thereon.

11 designates the walking-beam, which is rockingly connected to the upper end of the Samson-post by brackets 12 and boxes 13, so that said beam may rock vertically relative to the Samson-post.

Extending transversely of the carriage sills 4 is a cross-bar 14, and mounted upon this cross-bar is a guide-box 15, that is provided with a 1011 itudinal slot 16, theguidebox being locate in alinement with the samson-post.

17 is a slide-block loosely fitted in the guide-box and adapted to reciprocate in rearward and forward directions therein.

18 is a jack-rod having its upper end pivoted at 19 to the Samson-post 8 and its lower end provided with a fork 20, that straddles the guide-box 15 and is loosely connected to the slide-block 17 by a pivot-pin 21.'

22 is a throw-rod provided at its rear end with a fork 23, that straddles the guide-box 15 and is fitted to the pivot -pin 21 to connectthe throw-rod to the slide-block. This throw-rod is horizontally positioned and ex tends forwardly from the guide-box 15 and through the socket-box 5. The forward end of the throw-rod rests upon a catchlate 24, that is Su ported by the carriage-sil s. The throw-r0 1s provided with a handle 25, projecting upwardly from its forward end, and it bears at its lower side a pin 26, (see Fig. I,) that is adapted to enter a pin-hole in the catch-plate 24. When the Samson-post is to be tilted backwardly from the position seen in full lines, Fig. I, to the position seen in dotted lines, thereby throwing the walkingbeam to clear the tool-rope, the handle 25 of the throw-rod 22 is elevated to withdraw the pin 26 from the pin-hole in the catch-plate 24. The throw-rod 1s then shifted longitudinally in a rearward direction, thereby reciprocatin the slide-block 17 in the box 15. When this movement takes place, the jack-rod 18 seated upon a rocking bed-block 9, that is po is carried rearwardly with the slide-block and I the Samson-post is tilted backwardly to the desired degree to move the forward endof the walking-beam out of the path of travel of the tool-rope when the drilling-tool is being hoisted.

27 designates the temper-screw, that is of common construction and is equipped with a clamp 28, by which the tool-rope 29 is gripped.

The forward end of the walking-beam 11 has therein a vertical notch 11, and secured to this end of the walking-beam is a pair of U-shaped straps 30, that are located at opposite sides of the notch 11. These straps serve to support a hangerrod 31, that passes through the straps at the extreme for- 'ward end of the walking-beam and at the lower corner of said end and upon which the loop of the temper-screw 27 is hung. By mounting the hanger supporting the temperscrew at the extreme forward end of the walking-beam and at the lower side of said end I attain the advantage that when the walking-beam is tilted its entire travel isin a direction away from the tool-rope and therefore increases the clearance between the rope and the beam over what has heretofore been obtainable in other mountings of the temperscrew.

The walking-beam of the machine is vi brated through the medium of-a pitman 32, connected to its rear end and leading to a crank 33, carried by a shaft 34. The shaft 34 is driven by a band-wheel 35'.

36 is a friction-wheel mounted upon a shaft 37, that carries a rope reel, and which is provided with an eccentric 38.

39 is a friction-wheel associated with the band-wheel 35 and to which the frictionwheel 36 is adapted to be moved when the eccentric 38 is rocked through the medium of a throw-rod 40, having connection therewith and leading to a hand-lever 41.

I claim as my invention- 1. In a well-boring machine, the combination of a frame, a support associated with. said frame, a tilting Samson-post mounted upon said support, a walking-beam rockingly mounted on said samson-post, a jackrod pivoted to said Samson-post, a guidingbox, a slice-block reciprocally positioned in said guiding-box and to which said jack-rod is connected, a catch-plate mounted on said frame, and a throw-rod connected to said slide-block and provided with a pin adapted. to engage said catch-plate, substantially as set forth.

2. In a well-boring machine, the combination of a walkingbeam, means whereby said walking-beam is rockingly supported, a temper-screw, and means for connecting said temper-screw to said walking-beam; said connecting means consisting of a pair of straps fitted to the forward end of the walking-beam and a hanger-rod fitted within said straps at the lower forward extremity of said walking-beam, substantially as set forth.

LEROY K. ROBBINS. In presence of BLANCHE HOGAN, WM. H. SCOTT. 

